Was searching the City Ordinances as well as HRS and found this interesting tid bit., "Sec. 40-2.3 Prohibitions.
(a) No person shall use or possess with intent to use any shell, cartridge, bomb, gun or other device capable of emitting any
liquid, gaseous or solid substance or any combination thereof, which is injurious to person or property, or which is
nauseous, sickening, irritating or offensive to any of the senses; to injure, molest, discomfort, discommode or coerce
another in the use or control of the individual's person or property."
Didn't see anything else on discharge of a firearm on private property or within city/county limits, etc.